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.align #,0x90 in gas ignores the 0x90 and outputs any kind of nop it feels like. the one avoided by this patch is a 7 byte nop, which gas has been doing since at least 1999: http://sourceware.org/ml/binutils/1999-10/msg00083.html In order to match what gas does, we would need to make code alignment target-specific, import a lot of code, and face the question: exactly which gas {version,target,tune} combo are we trying to match? see i386_align_code in: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/config/tc-i386.c?annotate=1.460&cvsroot=src The smart noppery is turned on via the special casing of 0x90 at line 438 in md_do_align in: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/config/tc-i386.h?annotate=1.1&cvsroot=src |
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examples | ||
include | ||
lib | ||
tests | ||
win32 | ||
.gitignore | ||
arm-gen.c | ||
c67-gen.c | ||
Changelog | ||
coff.h | ||
configure | ||
COPYING | ||
elf.h | ||
i386-asm.c | ||
i386-asm.h | ||
i386-gen.c | ||
i386-tok.h | ||
il-gen.c | ||
il-opcodes.h | ||
libtcc.c | ||
libtcc.h | ||
Makefile | ||
README | ||
stab.def | ||
stab.h | ||
tcc-doc.texi | ||
tcc.c | ||
tcc.h | ||
tccasm.c | ||
tcccoff.c | ||
tccelf.c | ||
tccgen.c | ||
tccpe.c | ||
tccpp.c | ||
tccrun.c | ||
tcctok.h | ||
texi2pod.pl | ||
TODO | ||
VERSION | ||
x86_64-asm.h | ||
x86_64-gen.c |
Tiny C Compiler - C Scripting Everywhere - The Smallest ANSI C compiler ----------------------------------------------------------------------- Features: -------- - SMALL! You can compile and execute C code everywhere, for example on rescue disks. - FAST! tcc generates optimized x86 code. No byte code overhead. Compile, assemble and link about 7 times faster than 'gcc -O0'. - UNLIMITED! Any C dynamic library can be used directly. TCC is heading torward full ISOC99 compliance. TCC can of course compile itself. - SAFE! tcc includes an optional memory and bound checker. Bound checked code can be mixed freely with standard code. - Compile and execute C source directly. No linking or assembly necessary. Full C preprocessor included. - C script supported : just add '#!/usr/local/bin/tcc -run' at the first line of your C source, and execute it directly from the command line. Documentation: ------------- 1) Installation on a i386 Linux host (for Windows read tcc-win32.txt) ./configure make make test make install By default, tcc is installed in /usr/local/bin. ./configure --help shows configuration options. 2) Introduction We assume here that you know ANSI C. Look at the example ex1.c to know what the programs look like. The include file <tcclib.h> can be used if you want a small basic libc include support (especially useful for floppy disks). Of course, you can also use standard headers, although they are slower to compile. You can begin your C script with '#!/usr/local/bin/tcc -run' on the first line and set its execute bits (chmod a+x your_script). Then, you can launch the C code as a shell or perl script :-) The command line arguments are put in 'argc' and 'argv' of the main functions, as in ANSI C. 3) Examples ex1.c: simplest example (hello world). Can also be launched directly as a script: './ex1.c'. ex2.c: more complicated example: find a number with the four operations given a list of numbers (benchmark). ex3.c: compute fibonacci numbers (benchmark). ex4.c: more complicated: X11 program. Very complicated test in fact because standard headers are being used ! ex5.c: 'hello world' with standard glibc headers. tcc.c: TCC can of course compile itself. Used to check the code generator. tcctest.c: auto test for TCC which tests many subtle possible bugs. Used when doing 'make test'. 4) Full Documentation Please read tcc-doc.html to have all the features of TCC. Additional information is available for the Windows port in tcc-win32.txt. License: ------- TCC is distributed under the GNU Lesser General Public License (see COPYING file). Fabrice Bellard.